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CVE Record

CVE-2021-23390: Arbitrary Code Execution

The package total4 before 0.0.43 are vulnerable to Arbitrary Code Execution via the U.set() and U.get() functions.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2021-23390 is a critical arbitrary code execution flaw in the npm package total4 before 0.0.43. If a vulnerable application exposes affected U.set() or U.get() behavior to untrusted input, an attacker could potentially run code in the application context.

Executive priority

Treat as urgent for any exposed service using total4. The impact is potentially full application compromise, but urgency depends on confirmed package presence and reachable affected code paths.

Technical view

The issue affects total4 versions before 0.0.43 and is tied to U.set() and U.get() functions. The provided CVSS 3.1 score is 9.8, with network attack vector, low complexity, no privileges, no user interaction, and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most likely in Node.js applications directly or transitively using total4 below 0.0.43, especially where untrusted request data reaches affected utility calls. The source bundle does not identify specific downstream products.

Exploitation context

The source bundle marks the CVE as critical and includes exploit maturity as proof-of-concept, but CISA KEV is false. No provided source supports claims of active exploitation in the wild.

Researcher notes

Evidence is narrow: affected package, version boundary, functions, CVSS, Snyk advisory, and upstream commit are provided. The bundle does not provide exploit steps, affected application patterns, or active exploitation evidence.

Mitigation direction

  • Upgrade total4 to 0.0.43 or later.
  • Confirm transitive dependencies do not retain vulnerable total4 versions.
  • Review vendor advisories before relying on compensating controls.
  • Reduce untrusted input reaching affected utility functions until upgraded.

Validation and detection

  • Inspect application manifests and lockfiles for total4 below 0.0.43.
  • Check deployed build artifacts for the resolved total4 version.
  • Review code paths using U.set() or U.get() with external input.
  • Confirm remediation against the referenced upstream commit or release.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2021-23390 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P3.95.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2021-23390Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/atotal4unspecifiedListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.